DIY camper van conversions range from $5,000 to $60,000. Budget builds, costing $5,000-$15,000, use basic materials, while mid-range projects average $15,000-$30,000, with improved systems. High-end conversions, $30,000-$60,000, include quality components. Major expenses are electrical, insulation, kitchen, bathroom, and furniture, each costing a few thousand dollars depending on the quality and complexity of the setup.